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@@ -118,15 +118,8 @@ If you have previous experience with statically typed languages such as
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C, C++, or C# but never used a dynamically typed one before, it is advised you
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C, C++, or C# but never used a dynamically typed one before, it is advised you
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read this tutorial: :ref:`doc_gdscript_more_efficiently`.
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read this tutorial: :ref:`doc_gdscript_more_efficiently`.
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-Language
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---------
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-
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-In the following, an overview is given to GDScript. Details, such as which
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-methods are available to arrays or other objects, should be looked up in
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-the linked class descriptions.
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-
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Identifiers
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Identifiers
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-~~~~~~~~~~~
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+-----------
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Any string that restricts itself to alphabetic characters (``a`` to ``z`` and
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Any string that restricts itself to alphabetic characters (``a`` to ``z`` and
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``A`` to ``Z``), digits (``0`` to ``9``) and ``_`` qualifies as an identifier.
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``A`` to ``Z``), digits (``0`` to ``9``) and ``_`` qualifies as an identifier.
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@@ -140,7 +133,7 @@ that are considered "confusable" for ASCII characters and emoji are not allowed
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in identifiers.
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in identifiers.
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Keywords
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Keywords
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-~~~~~~~~
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+--------
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The following is the list of keywords supported by the language. Since
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The following is the list of keywords supported by the language. Since
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keywords are reserved words (tokens), they can't be used as identifiers.
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keywords are reserved words (tokens), they can't be used as identifiers.
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@@ -226,7 +219,7 @@ in case you want to take a look under the hood.
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+------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
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+------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
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Operators
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Operators
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-~~~~~~~~~
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+---------
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The following is the list of supported operators and their precedence. All binary operators are `left-associative <https://en.wikipedia.org/wiki/Operator_associativity>`_,
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The following is the list of supported operators and their precedence. All binary operators are `left-associative <https://en.wikipedia.org/wiki/Operator_associativity>`_,
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including the ``**`` operator. This means that ``2 ** 2 ** 3`` is equal to ``(2 ** 2) ** 3``. Use parentheses to explicitly specify precedence you need, for
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including the ``**`` operator. This means that ``2 ** 2 ** 3`` is equal to ``(2 ** 2) ** 3``. Use parentheses to explicitly specify precedence you need, for
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@@ -338,7 +331,7 @@ example ``2 ** (2 ** 3)``. The ternary ``if/else`` operator is right-associative
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and :ref:`is_zero_approx() <class_@GlobalScope_method_is_zero_approx>` functions instead.
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and :ref:`is_zero_approx() <class_@GlobalScope_method_is_zero_approx>` functions instead.
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Literals
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Literals
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-~~~~~~~~
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+--------
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+---------------------------------+-------------------------------------------+
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+---------------------------------+-------------------------------------------+
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| **Example(s)** | **Description** |
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| **Example(s)** | **Description** |
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@@ -452,7 +445,7 @@ Thus, a string can have a quote that matches the opening one, but only if it's p
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GDScript also supports :ref:`format strings <doc_gdscript_printf>`.
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GDScript also supports :ref:`format strings <doc_gdscript_printf>`.
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Annotations
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Annotations
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-~~~~~~~~~~~
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+-----------
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Annotations are special tokens in GDScript that act as modifiers to a script or
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Annotations are special tokens in GDScript that act as modifiers to a script or
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its code and may affect how the script is treated by the Godot engine or
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its code and may affect how the script is treated by the Godot engine or
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@@ -538,7 +531,7 @@ can replace the above code with a single line::
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as an error by default. We do not recommend disabling or ignoring it.
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as an error by default. We do not recommend disabling or ignoring it.
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Comments
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Comments
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-~~~~~~~~
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+--------
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Anything from a ``#`` to the end of the line is ignored and is
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Anything from a ``#`` to the end of the line is ignored and is
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considered a comment.
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considered a comment.
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@@ -573,7 +566,7 @@ considered a comment.
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Editor > Theme > Comment Markers** section of the Editor Settings.
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Editor > Theme > Comment Markers** section of the Editor Settings.
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Code regions
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Code regions
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-~~~~~~~~~~~~
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+------------
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Code regions are special types of comments that the script editor understands as
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Code regions are special types of comments that the script editor understands as
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*foldable regions*. This means that after writing code region comments, you can
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*foldable regions*. This means that after writing code region comments, you can
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@@ -641,7 +634,7 @@ folding code regions.
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group multiple elements together.
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group multiple elements together.
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Line continuation
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Line continuation
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-~~~~~~~~~~~~~~~~~
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+-----------------
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A line of code in GDScript can be continued on the next line by using a backslash
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A line of code in GDScript can be continued on the next line by using a backslash
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(``\``). Add one at the end of a line and the code on the next line will act like
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(``\``). Add one at the end of a line and the code on the next line will act like
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@@ -970,11 +963,8 @@ will set the value of ``x`` to a callable with ``$Sprite2D`` as the object and
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You can call it using the ``call`` method: ``x.call(PI)``.
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You can call it using the ``call`` method: ``x.call(PI)``.
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-Data
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-----
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-
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Variables
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Variables
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-~~~~~~~~~
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+---------
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Variables can exist as class members or local to functions. They are
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Variables can exist as class members or local to functions. They are
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created with the ``var`` keyword and may, optionally, be assigned a
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created with the ``var`` keyword and may, optionally, be assigned a
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@@ -1028,7 +1018,7 @@ Valid types are:
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the project settings. See :ref:`doc_gdscript_warning_system` for details.
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the project settings. See :ref:`doc_gdscript_warning_system` for details.
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Initialization order
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Initialization order
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-^^^^^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~~~~~
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Member variables are initialized in the following order:
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Member variables are initialized in the following order:
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@@ -1074,7 +1064,7 @@ Member variables are initialized in the following order:
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or remove the empty dictionary assignment (``= {}``).
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or remove the empty dictionary assignment (``= {}``).
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Static variables
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Static variables
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-^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~
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A class member variable can be declared static::
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A class member variable can be declared static::
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@@ -1178,7 +1168,7 @@ and must be placed at the top of the script, before ``class_name`` and ``extends
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See also `Static functions`_ and `Static constructor`_.
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See also `Static functions`_ and `Static constructor`_.
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Casting
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Casting
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-^^^^^^^
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+~~~~~~~
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Values assigned to typed variables must have a compatible type. If it's needed to
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Values assigned to typed variables must have a compatible type. If it's needed to
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coerce a value to be of a certain type, in particular for object types, you can
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coerce a value to be of a certain type, in particular for object types, you can
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@@ -1218,7 +1208,7 @@ the scene tree::
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($AnimPlayer as AnimationPlayer).play("walk")
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($AnimPlayer as AnimationPlayer).play("walk")
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Constants
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Constants
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-~~~~~~~~~
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+---------
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Constants are values you cannot change when the game is running.
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Constants are values you cannot change when the game is running.
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Their value must be known at compile-time. Using the
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Their value must be known at compile-time. Using the
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@@ -1250,7 +1240,7 @@ You can also create constants inside a function, which is useful to name local
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magic values.
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magic values.
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Enums
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Enums
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-^^^^^
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+~~~~~
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Enums are basically a shorthand for constants, and are pretty useful if you
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Enums are basically a shorthand for constants, and are pretty useful if you
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want to assign consecutive integers to some constant.
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want to assign consecutive integers to some constant.
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@@ -1298,7 +1288,7 @@ or ``0`` if it is the first entry in the enum. Multiple keys with the same value
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Functions
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Functions
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-~~~~~~~~~
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+---------
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Functions always belong to a `class <Classes_>`_. The scope priority for
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Functions always belong to a `class <Classes_>`_. The scope priority for
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variable look-up is: local → class member → global. The ``self`` variable is
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variable look-up is: local → class member → global. The ``self`` variable is
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@@ -1357,7 +1347,7 @@ return early with the ``return`` keyword, but they can't return any value.
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valid value to return.
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valid value to return.
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Referencing functions
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Referencing functions
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-^^^^^^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~~~~~~
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Functions are first-class values in terms of the :ref:`Callable <class_Callable>` object.
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Functions are first-class values in terms of the :ref:`Callable <class_Callable>` object.
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Referencing a function by name without calling it will automatically generate the proper
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Referencing a function by name without calling it will automatically generate the proper
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@@ -1386,7 +1376,7 @@ callable. This can be used to pass functions as arguments.
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performance issues on direct function calls.
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performance issues on direct function calls.
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Lambda functions
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Lambda functions
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-^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~
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Lambda functions allow you to declare functions that do not belong to a class. Instead, a
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Lambda functions allow you to declare functions that do not belong to a class. Instead, a
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:ref:`Callable <class_Callable>` object is created and assigned to a variable directly.
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:ref:`Callable <class_Callable>` object is created and assigned to a variable directly.
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@@ -1459,7 +1449,7 @@ Lambda functions capture the local environment::
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print(a) # Prints `[1]`.
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print(a) # Prints `[1]`.
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Static functions
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Static functions
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-^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~
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A function can be declared static. When a function is static, it has no access to the instance member variables or ``self``.
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A function can be declared static. When a function is static, it has no access to the instance member variables or ``self``.
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A static function has access to static variables. Also static functions are useful to make libraries of helper functions::
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A static function has access to static variables. Also static functions are useful to make libraries of helper functions::
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@@ -1472,14 +1462,14 @@ Lambda functions cannot be declared static.
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See also `Static variables`_ and `Static constructor`_.
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See also `Static variables`_ and `Static constructor`_.
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Statements and control flow
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Statements and control flow
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-~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+---------------------------
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Statements are standard and can be assignments, function calls, control
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Statements are standard and can be assignments, function calls, control
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flow structures, etc (see below). ``;`` as a statement separator is
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flow structures, etc (see below). ``;`` as a statement separator is
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entirely optional.
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entirely optional.
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Expressions
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Expressions
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-^^^^^^^^^^^
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+~~~~~~~~~~~
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Expressions are sequences of operators and their operands in orderly fashion. An expression by itself can be a
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Expressions are sequences of operators and their operands in orderly fashion. An expression by itself can be a
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statement too, though only calls are reasonable to use as statements since other expressions don't have side effects.
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statement too, though only calls are reasonable to use as statements since other expressions don't have side effects.
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@@ -1507,7 +1497,7 @@ Identifiers, attributes, and subscripts are valid assignment targets. Other expr
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an assignment.
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an assignment.
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if/else/elif
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if/else/elif
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-^^^^^^^^^^^^
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+~~~~~~~~~~~~
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Simple conditions are created by using the ``if``/``else``/``elif`` syntax.
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Simple conditions are created by using the ``if``/``else``/``elif`` syntax.
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Parenthesis around conditions are allowed, but not required. Given the
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Parenthesis around conditions are allowed, but not required. Given the
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@@ -1570,7 +1560,7 @@ use an ``if`` statement combined with the ``in`` operator to accomplish this::
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if "varName" in get_parent(): print("varName is defined in parent!")
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if "varName" in get_parent(): print("varName is defined in parent!")
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while
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while
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-^^^^^
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+~~~~~
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Simple loops are created by using ``while`` syntax. Loops can be broken
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Simple loops are created by using ``while`` syntax. Loops can be broken
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using ``break`` or continued using ``continue`` (which skips to the next
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using ``break`` or continued using ``continue`` (which skips to the next
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@@ -1582,7 +1572,7 @@ iteration of the loop without executing any further code in the current iteratio
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statement(s)
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statement(s)
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for
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for
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-^^^
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+~~~
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To iterate through a range, such as an array or table, a *for* loop is
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To iterate through a range, such as an array or table, a *for* loop is
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used. When iterating over an array, the current array element is stored in
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used. When iterating over an array, the current array element is stored in
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@@ -1645,7 +1635,7 @@ be manipulated by calling methods on the loop variable.
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node.add_to_group("Cool_Group") # This has an effect
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node.add_to_group("Cool_Group") # This has an effect
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match
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match
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-^^^^^
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+~~~~~
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A ``match`` statement is used to branch execution of a program.
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A ``match`` statement is used to branch execution of a program.
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It's the equivalent of the ``switch`` statement found in many other languages, but offers some additional features.
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It's the equivalent of the ``switch`` statement found in many other languages, but offers some additional features.
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@@ -1656,7 +1646,7 @@ It's the equivalent of the ``switch`` statement found in many other languages, b
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for example, the String ``"hello"`` is considered equal to the StringName ``&"hello"``.
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for example, the String ``"hello"`` is considered equal to the StringName ``&"hello"``.
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Basic syntax
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Basic syntax
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-""""""""""""
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+^^^^^^^^^^^^
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::
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::
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@@ -1668,7 +1658,7 @@ Basic syntax
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<...>
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<...>
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Crash-course for people who are familiar with switch statements
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Crash-course for people who are familiar with switch statements
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-"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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1. Replace ``switch`` with ``match``.
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1. Replace ``switch`` with ``match``.
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2. Remove ``case``.
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2. Remove ``case``.
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@@ -1676,7 +1666,7 @@ Crash-course for people who are familiar with switch statements
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4. Change ``default`` to a single underscore.
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4. Change ``default`` to a single underscore.
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Control flow
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Control flow
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-""""""""""""
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+^^^^^^^^^^^^
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The patterns are matched from top to bottom.
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The patterns are matched from top to bottom.
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If a pattern matches, the first corresponding block will be executed. After that, the execution continues below the ``match`` statement.
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If a pattern matches, the first corresponding block will be executed. After that, the execution continues below the ``match`` statement.
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@@ -1794,7 +1784,7 @@ The following pattern types are available:
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print("Yep, you've taken damage")
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print("Yep, you've taken damage")
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Pattern guards
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Pattern guards
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-""""""""""""""
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+^^^^^^^^^^^^^^
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A *pattern guard* is an optional condition that follows the pattern list
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A *pattern guard* is an optional condition that follows the pattern list
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and allows you to make additional checks before choosing a ``match`` branch.
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and allows you to make additional checks before choosing a ``match`` branch.
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@@ -1826,7 +1816,7 @@ you can specify a pattern guard after the list of patterns with the ``when`` key
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- If it's false, then the patterns of the next branch are checked.
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- If it's false, then the patterns of the next branch are checked.
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Classes
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Classes
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-~~~~~~~
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+-------
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By default, all script files are unnamed classes. In this case, you can only
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By default, all script files are unnamed classes. In this case, you can only
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reference them using the file's path, using either a relative or an absolute
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reference them using the file's path, using either a relative or an absolute
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@@ -1907,7 +1897,7 @@ If you want to use ``extends`` too, you can keep both on the same line::
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by the Godot editor.
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by the Godot editor.
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Inheritance
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Inheritance
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-^^^^^^^^^^^
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+~~~~~~~~~~~
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A class (stored as a file) can inherit from:
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A class (stored as a file) can inherit from:
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@@ -1984,7 +1974,7 @@ the function name with the attribute operator::
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Signals and notifications can also be useful for these purposes.
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Signals and notifications can also be useful for these purposes.
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Class constructor
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Class constructor
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-^^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~~
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The class constructor, called on class instantiation, is named ``_init``. If you
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The class constructor, called on class instantiation, is named ``_init``. If you
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want to call the base class constructor, you can also use the ``super`` syntax.
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want to call the base class constructor, you can also use the ``super`` syntax.
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@@ -2037,7 +2027,7 @@ There are a few things to keep in mind here:
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super(5)
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super(5)
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Static constructor
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Static constructor
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-^^^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~~~
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A static constructor is a static function ``_static_init`` that is called automatically
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A static constructor is a static function ``_static_init`` that is called automatically
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when the class is loaded, after the static variables have been initialized::
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when the class is loaded, after the static variables have been initialized::
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@@ -2052,7 +2042,7 @@ A static constructor cannot take arguments and must not return any value.
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.. _doc_gdscript_basics_inner_classes:
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.. _doc_gdscript_basics_inner_classes:
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Inner classes
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Inner classes
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-^^^^^^^^^^^^^
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+~~~~~~~~~~~~~
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A class file can contain inner classes. Inner classes are defined using the
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A class file can contain inner classes. Inner classes are defined using the
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``class`` keyword. They are instanced using the ``ClassName.new()``
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``class`` keyword. They are instanced using the ``ClassName.new()``
|
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@@ -2079,7 +2069,7 @@ function.
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.. _doc_gdscript_classes_as_resources:
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.. _doc_gdscript_classes_as_resources:
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Classes as resources
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Classes as resources
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-^^^^^^^^^^^^^^^^^^^^
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+~~~~~~~~~~~~~~~~~~~~
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Classes stored as files are treated as :ref:`GDScripts <class_GDScript>`. They
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Classes stored as files are treated as :ref:`GDScripts <class_GDScript>`. They
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must be loaded from disk to access them in other classes. This is done using
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must be loaded from disk to access them in other classes. This is done using
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@@ -2098,7 +2088,7 @@ class resource is done by calling the ``new`` function on the class object::
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a.some_function()
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a.some_function()
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Exports
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Exports
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-~~~~~~~
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+-------
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.. note::
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.. note::
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@@ -2108,7 +2098,7 @@ Exports
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.. _doc_gdscript_basics_setters_getters:
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.. _doc_gdscript_basics_setters_getters:
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Properties (setters and getters)
|
|
Properties (setters and getters)
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-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
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|
+--------------------------------
|
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|
|
Sometimes, you want a class' member variable to do more than just hold data and actually perform
|
|
Sometimes, you want a class' member variable to do more than just hold data and actually perform
|
|
|
some validation or computation whenever its value changes. It may also be desired to
|
|
some validation or computation whenever its value changes. It may also be desired to
|
|
@@ -2135,7 +2125,7 @@ Example::
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code use that name.
|
|
code use that name.
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|
Alternative syntax
|
|
Alternative syntax
|
|
|
-^^^^^^^^^^^^^^^^^^
|
|
|
|
|
|
|
+~~~~~~~~~~~~~~~~~~
|
|
|
|
|
|
|
|
Also there is another notation to use existing class functions if you want to split the code from the variable declaration
|
|
Also there is another notation to use existing class functions if you want to split the code from the variable declaration
|
|
|
or you need to reuse the code across multiple properties (but you can't distinguish which property the setter/getter is being called for)::
|
|
or you need to reuse the code across multiple properties (but you can't distinguish which property the setter/getter is being called for)::
|
|
@@ -2156,7 +2146,7 @@ The setter and getter must use the same notation, mixing styles for the same var
|
|
|
Separated setter/getter functions can have type hints, and the type must match the variable's type or be a wider type.
|
|
Separated setter/getter functions can have type hints, and the type must match the variable's type or be a wider type.
|
|
|
|
|
|
|
|
When setter/getter is not called
|
|
When setter/getter is not called
|
|
|
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
|
|
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
|
|
|
|
When a variable is initialized, the value of the initializer will be written directly to the variable.
|
|
When a variable is initialized, the value of the initializer will be written directly to the variable.
|
|
|
Including if the ``@onready`` annotation is applied to the variable.
|
|
Including if the ``@onready`` annotation is applied to the variable.
|
|
@@ -2194,7 +2184,7 @@ This also applies to the alternative syntax::
|
|
|
.. _doc_gdscript_tool_mode:
|
|
.. _doc_gdscript_tool_mode:
|
|
|
|
|
|
|
|
Tool mode
|
|
Tool mode
|
|
|
-~~~~~~~~~
|
|
|
|
|
|
|
+---------
|
|
|
|
|
|
|
|
By default, scripts don't run inside the editor and only the exported
|
|
By default, scripts don't run inside the editor and only the exported
|
|
|
properties can be changed. In some cases, it is desired that they do run
|
|
properties can be changed. In some cases, it is desired that they do run
|
|
@@ -2219,7 +2209,7 @@ See :ref:`doc_running_code_in_the_editor` for more information.
|
|
|
.. _doc_gdscript_basics_memory_management:
|
|
.. _doc_gdscript_basics_memory_management:
|
|
|
|
|
|
|
|
Memory management
|
|
Memory management
|
|
|
-~~~~~~~~~~~~~~~~~
|
|
|
|
|
|
|
+-----------------
|
|
|
|
|
|
|
|
Godot implements reference counting to free certain instances that are no longer
|
|
Godot implements reference counting to free certain instances that are no longer
|
|
|
used, instead of a garbage collector, or requiring purely manual management.
|
|
used, instead of a garbage collector, or requiring purely manual management.
|
|
@@ -2267,7 +2257,7 @@ freed.
|
|
|
.. _doc_gdscript_signals:
|
|
.. _doc_gdscript_signals:
|
|
|
|
|
|
|
|
Signals
|
|
Signals
|
|
|
-~~~~~~~
|
|
|
|
|
|
|
+-------
|
|
|
|
|
|
|
|
Signals are a tool to emit messages from an object that other objects can react
|
|
Signals are a tool to emit messages from an object that other objects can react
|
|
|
to. To create custom signals for a class, use the ``signal`` keyword.
|
|
to. To create custom signals for a class, use the ``signal`` keyword.
|
|
@@ -2478,7 +2468,7 @@ This also means that returning a signal from a function that isn't a coroutine w
|
|
|
during runtime.
|
|
during runtime.
|
|
|
|
|
|
|
|
Assert keyword
|
|
Assert keyword
|
|
|
-~~~~~~~~~~~~~~
|
|
|
|
|
|
|
+--------------
|
|
|
|
|
|
|
|
The ``assert`` keyword can be used to check conditions in debug builds. These
|
|
The ``assert`` keyword can be used to check conditions in debug builds. These
|
|
|
assertions are ignored in non-debug builds. This means that the expression
|
|
assertions are ignored in non-debug builds. This means that the expression
|
tetrapod00